‘Re-coding’ environmental regulation – a new simplified metric for daylighting verification during the window and indoor space design process

Evaluation and Optimization of Daylighting in Heritage Buildings: A Case-Study at High Latitudes

“…daylight factor DF (point, average and median): although this is an obsolete metrics, it was included in the study as it is still assumed as a reference in many national regulations and legislations [61], including the latest European standard EN 17037 on 'Daylight in buildings'; besides, the calculation method included in the European standard EN 15193-1:2017 [62] to determine the energy demand for lighting relies on the daylight factor concept to determine the daylighting level in an indoor space [63] finally, as DF refers to an overcast sky condition, it seems particularly suitable for Nordic countries such as Norway, where the case-study building is located, where sunny skies occur less than 25% of the time on an annual basis and overcast skies are therefore predominant; 2.…”

Questionnaires and simulations to assess daylighting in Italian university classrooms for IEQ and energy issues

“…• average daylight factor DF m . In the Italian context, the regulation body still refers to the DF m concept [40][41][42][43]. It is well known that DF m does not account for crucial factors such as climate, latitude, orientation, and use of moveable shades to control the sun penetration.…”

“…It is worth stressing that a minimum WFR value of 0.125 (WFR > 0.125) is prescribed by Italian building regulations as a ventilation requirement to guarantee a suitable air exchange in the room. However, it is commonly used by building practitioners and professional designers as a daylighting criterion as well, due to its simplicity and ease-of-use [43]. As shown in Fig.…”

Simple mathematical models to link climate-based daylight metrics with daylight factor metrics and daylighting design implications

“…Appropriate daylight-linked lighting controls can substantially save the electric lighting expenditure in commercial buildings [ 5 ]. To predict the daylight performance of room spaces and set a scale for architects and building engineers to use when comparing the aspects of various daylighting schemes, there are a number of rules of thumb and design metrics [ 6 ]. Traditionally, the daylight factor metrics (DFMs) have been used in evaluating of the interior daylight performance for a long time [ 7 ].…”